Peri-urban farming has been a historically important industry in many countries, but it is less important today in the United States. Expanding interest in local food production, based in part on the energy required to transport fresh produce across the country and the resulting carbon footprint, has created a focus on food-miles and urban agriculture. However, high land and energy costs, limited access to open spaces of sufficient size and proper shape, and shading from surrounding tall buildings reduce options for agriculture in urban settings. One suggestion has been vertical greenhouses located in the urban core. Peri-urban farming in traditional, horizontal greenhouses can be a better alternative.